Forum OpenACS Q&A: Re: Only install a portion of ACS on Oracle 8i
If you've already installed AOLserver, etc., then the easiest route is just to do the minimal OpenACS core install, with no add on packages. If you don't actually use many of the tables, that's ok, they'll just sit there with zero rows taking up no space anyway.
Btw, why Oracle 8i? It is so old, and 10g is much nicer in my experience.